Sartorius responded by writing, "happy valentine's day.. see you soon." He also shared a photo with Brown on Instagram Stories.

"happy valentine's day to this beautiful girl.. i miss eating chick fil a with you every day. see u soon @milliebobbybrown," the singer wrote.

The Stranger Things star was first linked to Sartorius in January following several interactions on social media. Actress Bella Thorne was among those to congratulate the pair after they went public Wednesday.